Apparatus for removing gases from liquids



L. D. MILLS APPARATUS FOR REMOVING GASES FROM LIQUIDS May 29, 1928. 1,671,601

Filed July 16, 1925 vamp 0M BY I ' ATTORNEY Patented May 29, teas.

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. Y tar LOUIS D. MILLS, OF PALO ALTO, CALIFORNIA; ASSIGNOR TO THE MERRILL COMANY,

OF SAN FRANCISQO, CALIFORNIA, A CORPORATION F CALIFORNIA.

APPARATUS FOR REMOVING GASES FROM LIQUIDS.

Application filed July 16, 1925. Serial No. 44,033.

The invention relates to an improvement in apparatus for removing dissolved gases from liquids; and more especially from flowing liquids.

Apparatus used for removing dissolved gases from flowing streams of liquid usually comprise a receiver or receptacle which is connected with a vacuumizing means and through which the liquid is caused to flow. The deaerated liquid is withdrawn. from the receptacle by a pump or by the action of' gravity. The use of a pump for this purpose has heretofore been considered 0b ec-' tionable because no efficient means has been found for preventing leakage of air and other gases into the deaerated liquid through the working parts of the pump. The use of gravi'tv to Withdraw the deaerated liquidkfrom the receptacle is-objectionable because, to overcome the holding action of the vacuum on the liquid in the receptacle, it has been necessary to locate the receptacle at the requisite height above the level at which the deaerated liquid is used,

the height of the receptacle depending on the elevation of the locality above sea level. The arrangement of the receptacle at this relatively great distance above the point at which the deaerated liquid is used has re the receptacle and withdrawing it therequired the. employment of expensive supporting structure and apparatus, mcludmg pipes, suitable for feeding the l1qu1d 1nto from. v

One object of the present invention is to provide an apparatus for removing gases from liquids of such construction that the apparatus may be located as close to ground level as the limits of an ordinary building construction will permit. When a metalliferous solution is deaerated it is necessary for the most eificient recovery of the metals in the subsequent precipitation operation that all traces of air be removed from the I solution. Hence it is necessarv that air and other gases should be prevented from entering the deaerated solution after the latter has been withdrawn from the receptacle. To.

this end it has been proposed heretofore to prevent air and other gases from entering the solution through the bearings and other joints of the pumpnsed to withdraw the solution "from the receptacle. So far as known, however, the means heretofore used for this purpose have been ineffective. A further 0 ject of the invention is to so arrange --the pump that air. or other gases will be efi'ectually prevented from entering the, deaerated liquid. These objectsare accomplished in the improved apparatus for re moving gases from liquids hereinafter more fully described and particularly pointed out in the appended claims.

.The preferred form of the invention is illustrated in the accompanying drawing which is a side elevation, partly in section, showing the variousparts of the apparatus in diagrammatic outline. The various parts constituting the improved-apparatus may be of usual construction and mode of operation. 1

The improved apparatus comprises a receptacle or receiver 1,- in the form of an upright tank, connected by the pipe 2 with ceptacle 1. The flow of liquid through the v pipe 6 into the receptacle 1 is controlled by a butterfly valve 7 provided with an arm 8 pivotally connected by a link 9 with the arm-10 of the usual float (not shown) within the receptacle 1 for controlling the level of the liquid therein.

The tank 5 is supplied with liquid to be deaerated through the pipe 11 provided with the hand operated valve 12. The level 13 of the liquid 14 in the tank is controlled by a float 15 mounted on the outer end of an arm 16 connected'with a valve 17 in the pipe 11. The vacuum pump 3 causes the pressure in the receptacle 1 to be reduced and the solution to flow from the tank 5 up through the pipe 6 and into the top of the receptacle 1, whence it passes down through the usual means for dividing it into small articles so that the vacuum may be. efi'ective in with: drawing the dissolved or entrained air there- :trom. When the valve 7 in the pipe 6 is closed by the rising of the float in the reof liquid to the rising of the float 15 andthe closing of the valve 17 in the pipe 11.

ceptacle 1, thereby permitting the level of the solution in the tank 5 to rise, the supply tank 5 is shut ofi by the The deaerated liquid 1s drawn from the bottom of the receptacle lIthrough the pipe bracket rising fromjthe base 26 and the i i outer end of theshaft 22 is supported by 20 the upright bracket 27. The point where the shaft 22 passes through the wall 28 of the tank 5 is sealed by a gland 29. And the point where the shaft 22 entersthe side of the pump liquid 14 in the tank, 5 from entering the pump 19 and mixing with the deaerated liquid withdrawn from the receptacle 1 and discharged from the pipe 20, Thus air in any form is effectually prevented from en- 19 is sealed by the gland 30.. The gland 30 prevents any of the' untreated tering the deaerated liquid discharged from the receptacle 1. Having thus described the invention what I claim as new is:- 1. An apparatus for removing liquids comprising, a receptacle, creating a vacuum in gases from means for the receptacle, a tank for containing liquid to be deaerated, means for supplying the tank-with, liquid, a pipe leading from the the tank through which the liquid to be deaerated is drawn into the receptacle, a pump, provided with a gland, submer ed in the top of the receptacle into liquid in the tank, for withdrawing the dcaerated li uid from the receptacle, a pipe leading from the bottom of then'eceptacle to the intake of the pump, and means for actuating the pump.

2; An apparatus for removing liquids 'comprismg, a receptacle, means for creating a vacuum in the receptacle, means gases from a for conducting liquid into the receptacle,a

pump, provided with a gland,-for withdrawing the liquid from the receptacle, and a tank for containing liquid in which the pump and gland are submerged to prevent Y leakage of air" through the gland into the pump. I

- I LOUIS 1), MILLS. 

